AVNI BEHLULI1*, AGIM CANKO2, SHUKRI FETAHU1
1University of Prishtina “Hasan Prishtina”, Faculty of Agriculture and Veterinary, Department of Plant Production, Prishtina, Kosovo
2Agricultural University of Tirana, Faculty of Agriculture and Environment, Department of Plant Sciences and Technologies
*Corresponding author e-mail: firstname.lastname@example.org
Grain indices, such as size and shape, are very important parameters used in the morphogenetic characterization and evaluation of bean populations. For this purpose during the years 2016-2017 in the Experimental Didactic Farm of the Faculty of Agriculture and Veterinary in Prishtina, grain indices were analysed in 20 common bean populations, cultivars and lines. The investigated parameters were grain elongation in three orientations (Ew, Et, Ev), geometric mean diameter (Dg, mm), sphericity (φ, %), surface area (S, cm2), geometric volume (V, cm3) and grain density (Gd, g/cm3). All parameters were analysed using geometric calculations and formulas based on average values obtained, respectively length, width, thickness, and replacement volume. The results of the study show that the higher average values of the geometric diameter of the grain had the FAGB194 population, which at the same time had higher grain mass, volume and surface area values. Whereas, regarding the sphericity, the highest values had the FAGB191 population, but associated with lower grain density values compared to other populations. Regarding the elongation in the vertical and the thickness orientation, the highest average values had the population Trenaria, while the lowest values were found in the population FAGB189. According to the physical traits of the grain, the studied populations were divided into two groups: the first group includes populations with elliptic shaped grain, while in the second group the populations were grouped kidney shaped grains, which correlate with sub-compressed and compressed grain forms. Since the grain morphological traits determined by genetic factors, the studied populations could be used in genetic improvement programs for the creation of ideotypes suitable for different environments and cultivation methods.
Keywords: Common bean, shape, sphericity, geometric diameter, ideotype.